mirror of https://github.com/acidanthera/audk.git
128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/** @file
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Specific relocation fixups for ARM architecture.
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Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
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Portions copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
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Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "BasePeCoffLibInternals.h"
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#include <Library/BaseLib.h>
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// Note: Currently only large memory model is supported by UEFI relocation code.
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/**
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Performs an AARCH64-based specific relocation fixup and is a no-op on other
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instruction sets.
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@param Reloc The pointer to the relocation record.
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@param Fixup The pointer to the address to fix up.
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@param FixupData The pointer to a buffer to log the fixups.
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@param Adjust The offset to adjust the fixup.
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@return Status code.
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**/
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RETURN_STATUS
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PeCoffLoaderRelocateImageEx (
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IN UINT16 *Reloc,
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IN OUT CHAR8 *Fixup,
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IN OUT CHAR8 **FixupData,
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IN UINT64 Adjust
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)
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{
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UINT64 *Fixup64;
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switch ((*Reloc) >> 12) {
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case EFI_IMAGE_REL_BASED_DIR64:
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Fixup64 = (UINT64 *) Fixup;
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*Fixup64 = *Fixup64 + (UINT64) Adjust;
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if (*FixupData != NULL) {
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*FixupData = ALIGN_POINTER(*FixupData, sizeof(UINT64));
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*(UINT64 *)(*FixupData) = *Fixup64;
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*FixupData = *FixupData + sizeof(UINT64);
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}
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break;
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default:
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return RETURN_UNSUPPORTED;
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}
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return RETURN_SUCCESS;
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}
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/**
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Returns TRUE if the machine type of PE/COFF image is supported. Supported
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does not mean the image can be executed it means the PE/COFF loader supports
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loading and relocating of the image type. It's up to the caller to support
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the entry point.
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@param Machine Machine type from the PE Header.
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@return TRUE if this PE/COFF loader can load the image
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**/
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BOOLEAN
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PeCoffLoaderImageFormatSupported (
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IN UINT16 Machine
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)
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{
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if ((Machine == IMAGE_FILE_MACHINE_ARM64) || (Machine == IMAGE_FILE_MACHINE_EBC)) {
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return TRUE;
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}
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return FALSE;
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}
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/**
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Performs an ARM-based specific re-relocation fixup and is a no-op on other
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instruction sets. This is used to re-relocated the image into the EFI virtual
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space for runtime calls.
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@param Reloc The pointer to the relocation record.
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@param Fixup The pointer to the address to fix up.
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@param FixupData The pointer to a buffer to log the fixups.
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@param Adjust The offset to adjust the fixup.
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@return Status code.
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**/
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RETURN_STATUS
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PeHotRelocateImageEx (
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IN UINT16 *Reloc,
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IN OUT CHAR8 *Fixup,
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IN OUT CHAR8 **FixupData,
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IN UINT64 Adjust
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)
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{
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UINT64 *Fixup64;
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switch ((*Reloc) >> 12) {
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case EFI_IMAGE_REL_BASED_DIR64:
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Fixup64 = (UINT64 *) Fixup;
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*FixupData = ALIGN_POINTER (*FixupData, sizeof (UINT64));
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if (*(UINT64 *) (*FixupData) == *Fixup64) {
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*Fixup64 = *Fixup64 + (UINT64) Adjust;
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}
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*FixupData = *FixupData + sizeof (UINT64);
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break;
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default:
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DEBUG ((EFI_D_ERROR, "PeHotRelocateEx:unknown fixed type\n"));
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return RETURN_UNSUPPORTED;
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}
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return RETURN_SUCCESS;
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}
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